A concrete population is a population that consist of definite
or concrete observations and those that really exist. Examples are: all the
students of a class, the alphabet, all the workers in the factory. While hypothetical
population on the other hand, are population that consist of imaginary or
hypothetical observations. It is not well defined and the samples had not been
selected from existing population. Examples for this are: all
possible toxicity measures of a new drug, GPAs of all young adults (including
those not in school) and the
number of years’ people would have lived if they had quit smoking.
